Barber&#39;s chair.



. J. R. HIBBETS.

BARBERS CHAIR.

APPLICATLON FILED SEPT-15.1913.

1 ,138,4:77. Patented May 4, 1915.

2 SHEETS-SHEET I.

UMP/W QLA W/ I THE NORRIS PETERS CO. PHOWLITHQ, WASHINGTON, D. C

J. R, HIBBETS.

BARBERS CIrIAIR. APPLICATION FILED SEPT-15, I913.

Patented May 4, 1915.

2 SHEETS-SHEET 2.

attommq THE NORRIS PETERS CCL, PHOTO-LITHO., WASHINGTON. D. C.

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JOSEPH R. HIBBETS, OF TRENTON, NEW JERSEY.

BARBER/S CHAIR.

Specification of Letters Patent.

Patented May 4:, 1915.

Application filed September 15, 1913. Serial No. 789,753.

The present invention relates to improvements in chairs and particularly to chairs having adjustable or reclining backs and re volving seats, as barbers chairs, dentists surgical chairs, etc.

The primary object of the invention is the .provision of simple, durable and effective lockin means actuated b the same instrumentality, for locking and holding the back or seat of the chair in adjusted position, and

- the invention is not only applicable to chairs newly constructed, but is equally well adapted for use with the standard type of barbers chairs now in use.

The invention consists in certain novel combinations and arrangements of parts,

device, showing their relationship.

including pawls and racks, by which the movable or adjustable parts of'the chairare looked, as will be more clearly pointed out hereinafter.

In the accompanying drawings I have illustrated one complete example of the physical embodiment of my invention constructed according to the best mode I have so far devised for the practical application of the principles of the invention.

Figure l is a perspective view of a stand ard type of barbers chair with my invention embodied therein. Fig. 2 is a diagrammatic representation of the locking parts of the Fig. 3 shows the seat frame in side elevation and partly broken away to illustrate the invention. Figs. 4., 5, and 6 show different p0sitions of the releasing device; :Fig. 4 shows the position wherein the seat may bereclined or adjusted; Fig. 5 shows the position wherein the seat may be revolved and then locked when the lever is released; and Fig. 6 shows the position of the cam when a barbers chair is in position'to receive a customer, for instance, so that the chair is freely revoluble and will not lock automatically. Fig. 7 is a plan view of the seat frame and locking device. Fig. 8 is a cross section of Fig. 7 on line 88.

In the drawings I have illustrated my invention as utilized in connection with a barbers chair of well known type having the reclining or adjustable back 1 seat cushion 2,

seat frame 3 of metallic construction and open in its center; legs a and arms 5 pivoted together at 6, and the arms are pivoted to the adjustable back 1 at 7 in ears 8 that rise from the seat frame 3.

with the seat frame and located at the front thereof. From this brief description it will be understood that the chair is revoluble on The legs 4 are plvoted to cars 9 at 10, and the ears are rigid a pedestal 11, and that when the back 1 is pushed to the rear by hand it swings on its pivots 7, pulls on the handle bars 5 and through the connection 6 causes the legs and foot rest to swing out and forward or upward on the pivots 10 in well known manner. These before mentioned parts are of' the wellknown type of barbers chair and in Fig. 7 it will be seen that the open center frame 3 is formed with a spider comprising supportsor legs 12 radiating from a central hub 13 as seen most clearly in Fig. 8. This hub revolves about a cap plate 14: which is bolted to the top of the pedestal 11 and to provide for free and easy movement a ball bearing is used in which the balls 15 rotate in contact with the upper and lower bearing plates or disks 16 and 17, the former revoluble with the chair and the latter fixed on the cap plate let.

When unlocked the chair is permitted to revolve freely on the pedestal as described. To look the chair against revolution I employ a rack wheel 18 fixed to the center of the cap plate l-fi by a screw or bolt 19 and nut 20, and the two pins 21 insure the fixed relationship of the wheel and cap plate against rotation. This rack wheel is adapted to be engaged by a locking pawl 22 which is formed with teeth to engage the teeth of the wheel, and is normally in contact with the wheel to hold the chair locked against revolution. This pawl is slidable on a frame 23 which is fixed to and revolves with the seat frame spider or arms 12, and a cap plate 24: confines the slidable pawl within limits and guides its movement which is radial to the center of the hub of the frame.

This pawl is held in engagement with the rack wheel by means of a slide key 25 which is movable at right angles to the pawl 22 and is actuated through the medium of the side lever 26, crank arm 27 and link 28 (Fig. 7), the latter being loosely connected to the perforated car 30 of the key 25. The key is slidable also on the frame 23 and is confined and guided by a plate 31 which is cut away or slotted at 32 to allow for the movement of the ear of the key. At the right in Fig. 2 it will be seen that the key is cut away and a shoulder 33 is formed thereon, while a similar construction provides a shoulder 34 at the end of the pawl 22. Thus in Fig. 2, it will be seen that when the key 25 is moved to the left the shoulder 33 passes the shoulder 34 and the pawl 22 is then free to enter the recess in the key at one end and be disengaged from the rack wheel 18 at the other, when the chair may be revolved. And a reverse movement of the key restores the parts to the position shown to lock the chair against revolution.

The locking device for the adjustable back 1 includes a rack bar 35 located directly over the center of the rack wheel but having no operative connection therewith. The rack bar is slidable on the frame 23 and under the cap plate 36 which latter is slotted at 37 (Fig. 3) to allow for movement of a perforated ear 38 on the rack bar 35. This ear has pivoted thereto by means of a bolt 39 and ears 40, a yoke 41, and the arms of the yoke are pivoted to the chair legs 4, 4, by bolts 42, so that when the chair back is pushed to the rear or pulled to the front,'the movement of the legs on their pivots as described, will be provided for when the rack bar is free to slide. In Fig. 2 the rack bar is locked against movement by the slidable pawl 43 which at one end has teethto engage the rack bar and at the other end is cut away to form a shoulder 44 to co-act with a shoulder 45 formed by cutting away the left end of the key 25, similar to the construction and connection of-the key and pawl 22. To free the pawl 43 and permit the back to be moved to adjusted position, the slide key is moved to the right in Fig. 2 by the lever 26 and the movement permits the end of the pawl 43 to enter the cut away part of the key and allows the toothed end of the pawl 43 to become disengaged from the rack bar.- To hold-the parts in position I use a cam block 46 secured to the lever bar 26 by a set screw 47, and a flat metallic spring 48 secured at 49 to the seat frame, bears on the fiat cam face 50 of the block to return it and the lever bar 26 to normal position, as in Fig. 3. In Fig. 4 the lever has been turned to the right and the pawl 43 is freed from the rack bar. The back is then pushed to the rear to the desired position, the lever 26 is released, the spring bears down on the block 46 returning it to normal position, and the key 43 is forced by the shoulders 44, 45 to lock the rack bar which has been moved through the de-' scribed connections with the chair back.

In Fig. 5 the lever has been moved to the left taking with it the key 25, freeing pawl 22 and allowing the chair to be revolved, but as soon'as the lever is released, the spring 48 bearing on the block will return it to position in Fig. 3 thus locking the parts in adjusted position. In Fig. 6 the block is on a dead center having been turned to the left. In this position the pawl 22 is freed from the rack wheel, and the chair may be revolved freely,'but not locked because the spring is inert.

Having thus fully described my invention,

. what I claim is 1. The combination with a pedestal-and a- The combination with a chair and its pedestal and a rack wheel fixed relativelyto said pedestal, of a toothed pawl engaging the wheel, a movable rack bar and a pawl engaging said rack bar and a key common to both pawls whereby the movement of the key will free either of said pawls, and means. cooperating with said parts to hold them in adjusted positions.

3. The combination with a revoluble chair and its pedestal and a rack wheel fixed relatively to said pedestal, of a radially slidable pawl mounted on the chair, engaging the wheel and having its end cut away to form a shoulder, a movable rack bar mounted on the chair, disposed over the center of said rack wheel and out of operative connection therewith, a pawl engaging said rack bar and having a cut away end forming a shoulder and a slidable key mounted on the chair having cut away portions conforming to the two pawls whereby the movement of the key will free either of said pawls.

In testimony whereof I aihx my signature in presence of two witnesses.

JOSEPH R. HIBBETS. Witnesses:

lV. HOLT AreAn. ANNA T. lVIULDooN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latents,

Washington, D. 0 

